Study: Long-term post-COVID altered sense of smell in healthcare workers common The authors found that 37% of the COVID-positive group suffered quantitative olfactory dysfunction. CIDRAP

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"Perhaps even more striking, 24% of all tested COVID-19 survivors still experience parosmia 2.6 years after COVID-19 diagnosis, nearly half of which experience medium to severe symptoms," the authors concluded. "Given the length of time, it is possible that these olfactory problems may not be fully reversible in a plurality of individuals."

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